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January 1, 1923. 


60 EAST 


/E LEITZ\ 

\KeWWrk7 


10th ST. 


PRICE LIST No. 4 

for 

Catalog G 

Photomicrographic Apparatus and Accessories 


Page Cat. No. Price 

9 398 With automatic 

arc lamp of clock¬ 
work mechanism. $185.00 

399 10.00 

400 4.00 

401 7.50 

402 15.00 

403 2.50 

404 3.00 

405 4.00 

406 5.00 

407 1.00 

408 .@ $1.50 7.50 

409 5.00 

411 40.00 

412 With automatic 
arc lamp of clock¬ 
work mechanism. 165.00 

413 37.50 

10 414 . 4.00 

415 . 7.50 

417 8.50 

418 12.50 

419 .08 

16 440 . 105.00 

441 6.00 

442 7.50 

443 7.50 

444 32.50 

447 . 22.50 

Automatic arc 
lamp of clockwork 
mechanism. 35.00 

449 8.50 

450 12.50 

451 .08 

20 461 . 50.00 

462 7.50 

463 10.00 

464 60.00 

465 7.50 

466 22.00 

Automatic arc 

lamp of clockwork 
mechanism. 35.00 

467 8.50 

468 12.50 

469 .08 

21 Micro Summar 24mm.. 36.00 

Micro Summar 35mm.. 36.00 

Micro Summar 42mm.. 36.00 

Summar 64mm. 40.00 

Summar 80mm. 44.00 


Page Cat. No. Price 

21 Summar 100mm. $47.50 

Summar 120mm. 55.00 

22 Achromatic Objectives 

1* . 4.00 

1 . 6.50 

la. 11.00 

2 . 6.50 

3 . 6.50 

3a. 8.80 

4 . 11.00 

5 . 11.00 

6 . 13.25 

7 . 13.25 

10 . 35.00 

1/12 . 44.00 

23 Fluorite Objectives 

6a ..'. 17.50 

7a . 17.50 

8 . 20.00 

8 with correction 

collar . 26.50 

9 . 31.00 

9 with correction 

collar . 37.50 

l/12a . 57.00 

1/16 . 69.00 

23 Apochromatic Objectives 

16mm. 26.50 

8mm. 35.25 

4mm. 48.50 

3mm. •. 57.25 

2mm. N. A. 1.32... 77.00 

2mm. N. A. 1.40... 110.00 

24 Huyghenian Eyepieces 

0.’. 2.25 

1. 2.25 

II. 2.25 

III . 2.25 

IV . 2.25 

V. 2.25 

24 Compensating Eyepieces 

2 . 5.50 

4 . 5.50 

6 . 5.50 

8 . 7.75 

12 . 7.75 

18 . 6.50 

4 or 6 with micro¬ 
meter . 8.76 

24 Projection Eyepieces 

1. 17.50 

II. 17.50 

III. 17.50 


The manufacture of those items listed in Catalog G, but not mentioned in this price 
list, has been suspended until further notice. 


500—12-22—B. 























































































Catalogue No. 43 G. 


Photomicrographic Apparatus. 


E. Leitz 

Wetzlar 

Germany. 


Established in 1849. 


Branch Offices: 


30 East 18th. Street, 

New-York. 


320-326 Dearborn Str., 

Chicago. 


9 Oxford Str. 

London W. 


Luisenstrasse 45, 

Berlin N.W. 


Neue Mainzerstr. 24, 

Frankfort o/M. 


Woskressenski 11, 

St. Petersburg. 









Notices and Terms. 


This Catalogue supersedes all previous editions. 

Instruments, when being ordered, should be described in strict 
accordance with the Catalogue, and complete outfits should be further 
identified by the prefix numbers given in each case. In telegraphic 
orders use should be made of the code-words appended to the prices. 

All prices are strictly nett for delivery at our establishments. 

Packing is charged for at cost price. 

We have Branch Offices in New-York, Chicago, 
London, St. Petersburg, Berlin and Frankfort as 
well as Agencies in all University Centres. 

We shall esteem it a favour if, subject to your convenience, 
you will kindly place your orders with our local offices and agencies. 

Telegraphic Address: “Conmover, New-York.” 





Digitized by the Internet Archive 
in 2019 with funding from 
Getty Research Institute 


https://archive.org/details/photomicrographiOOerns 


Preface 


Since publishing our last Catalogue of Photomicrographic 
Apparatus and Objectives we have materially improved and added 
to existing models in the light of the experience gained by an ever 
increasing number of workers in this branch of Science. 

We have also constructed entirely new apparatus to do justice 
to the most recent requirements. In this connection we would draw 
particular attention to the new large apparatus listed with a Camen 
having a maximum extension of 1 metre, also to the new appa¬ 
ratus for taking photographs of Insects after Prof. Hermann. 

As an appendix to this list will be found reproductions of 
actual photographs taken with our objectives and apparatus, which 
cannot tail to carry conviction as to their excellence. 

Any of the following Catalogues will be forwarded post free 
on application. 

1. Catalogue of Microscopes, No. 43 A. 

2. Catalogue of Petrological and Metallographie Microscopes, 

No. 43 B. 

3. Catalogue of Dissecting Microscopes, Lens holders, and 
Magnifiers, No. 43 C. 

4. Catalogue of Microscope Accessories, No. 43 D. 

5. List of Haematological Appliances, No. 43 E. 

6. Catalogue of Microtomes, No. 43 F. 

7. Catalogue of Photo-micrographic Apparatus, No. 33 G. 

8. List of Projection Apparatus and Drawing Appliances 
involving the principle of Projection, No. 43 H. 

9. List of Prism Binoculars, No. 43 J. 

Electros of the illustrations contained in these catalogues are 
at the service of authors wishing to describe, or refer to, any of 
our instruments in their works or papers. 

Wetzlar, January 1911. 

E. Leitz. 


5 


New Large 

Photomicrographic Apparatus I a 


This Apparatus is characterised by its long Camera sliding 
upon an optical bench. The essentia] advantage of such a Camera 
consists in obtaining a large variety of magnifications with a single 
objective, but, in addition to this, greater depth ot focus is obtained 
by using an objective of relatively low magnifying power with an 
extended bellows. 

The optical bench, which is in two parts, consists of steel 
tubes mounted at either end and also midway upon cast iron 
feet the two halves being connected by a hinge arrangement. Upon 
these tubes can be fitted the various carriers, the curved feet of 
which fit the tubes exactly, any required position being maintained 
by means of clamping screws. 

The Camera occupies one half of the optical bench resting 
upon two carriers, one of which holds the focussing screen, while 
the other carries the camera front with a portion of the light tight 
connection. 

By means of the hinge provided the Camera can be brought 
into a vertical position, the apparatus may therefore be used either 
vertically or horizontally as required. 

The Camera can be extended to any required distance up to its full 
length of 100 cm. (40 inches), as each carrier can be moved independently 
of the other. The bellows besides being very substantially made have 
additional wire supports, two in number, to prevent sagging when 
fully extended; the lower portion of the bellows is hinged to the 
focussing screen so that, upon the withdrawal of two bolts which 
keep the upper portion in position, it can be retracted in order 
to observe the image from the front whilst making the necessary 
adjustments. 

Two Focussing Screens, one of ground glass and the other 
of clear plate glass, are supplied with the apparatus, together with 
two single dark slides taking plates 24 cm. square, with carriers 
for smaller sizes, either English or Continental. 

The front of the Camera is also fitted with a pneumatic shutter 
for time and instantaneous exposures, and the light tight connection 
referred to above, into which, when working with photographic 
lenses only, i. e. with Microsummars, without the Microscope, the 
adapters carrying the objectives can be pushed. 


6 


New Large Photomicrographic Apparatus la. 
(Horizontal Position.) 


The other half of the optical bench is occupied by (I) the 
Microscope mounted upon a sliding baseplate (2) an illuminating 
lens or condenser (3) a large iris diaphragm, and (4) a Liliput Arc 
Lamp, each of which is adjustable for height, that for the sliding- 
baseplate carrying the microscope being controlled by a hand wheel 
below the level of the steel rods, this adjustment being necessary 
to compensate for the difference in the height of the optic axis of 
the various patterns of our Microscopes when placed in a horizontal 
position. 

A special mechanism is fitted to the baseplate, which in con¬ 
junction with a lengthening rod, permits of the fine adjustment being 
effected whilst observing the image on the screen. 












































New Large Photomicrographic Apparatus la. 

(Vertical Position) 

For taking photographs of large objects with the Microsummars, 
without the microscope, a special vertical stage is provided mounted 
on a sliding carrier and fitted with a micrometer screw fine adjust¬ 
ment, to which the lengthening rod referred to above can also be 
connected should the length of the camera necessitate its use. A 
series of interchangeable diaphragms are supplied with the stage, 
the diameter of each of which corresponds approximately to the 
focal distance of the lens with which it is to be used, each diaphragm 
being provided with an illuminating lens which will illuminate uni¬ 
formly and without colour the given aperture. Objectives and dia¬ 
phragms are marked so that the correct pair can be rapidly selected, 
and the set, together with the adapters to carry the objectives to 
the light-tight sleeve, are packed in a case with lock. 

The whole apparatus is placed upon a table of about 225 cm. 

(8 feet) in length, which is so constructed as to be easily taken to 
pieces for packing. 

No. 

398. New Large Photomicrographie Apparatus la, available for use 
both in vertical and horizontal position with Camera 1 metre (40 inches) 
in length, mounted upon a steel frame. One ground and one clear 
glass focussing screen, two single dark slides for plates 24 cm X 24 
cm, with carriers for smaller English or German sizes. Time and 
instantaneous shutter with pneumatic release. Base plate with vertical 
adjustment to suit any of our Microscopes. Large Illuminating Lens 


8 



















No. 

on Stand, together with two additional stands to carry the 
Iris Diaphragm and Source of Light. Magnifying Glass 
for focussing the image on the screen, and Shutter 
between Microscope and Camera. 

399. Iris Diaphragm to fit on Stand, with cell containing 3 

glass discs, yellow, green, and white, with ground surface, 
for use as light filters. 

400. Glass Tank mounted to fit Pillar Stand. 

401. Focussing Gear to operate new fine adjustment of 

Stand from end of Camera. 

402. Stage with sliding and micrometer screw fine adjust¬ 

ment to carry large specimens not exceeding 100 m/m 
in diameter . 


$ Code word 


120.— Mieonia 


8— Mieranieo 
3.20 Mierantho 

6.— Mieraspis 


12.— Mieraster 


(when working with extended Camera the lengthening rod is required 

for focussing.) 

403. Diaphragm with illuminating Lens for Microsummar 24 m/m 


2.— Mierobal 


404. 

Do 

Do 

Do 

35 m/m 

2.40 

Mierobio 

405. 

Do 

Do 

Do 

42 m/m 

3.20 

Mieroearpa 

406. 

Do 

Do 

Do 

64 m/m 

4.— 

Mieroeebus 

407. 

Do 

without illuminating lens 

Do 

80 m/m 

.80 

Mieroeiona 


(For the Microsummars 100 and 120 m/m the opening of the stage 
acts as a diaphragm; the large condenser provided with the appa¬ 
ratus will be found as efficient as a special lens for illuminating 
the microsummars 80, 100, and 120 m/m. 


With these illuminating Lenses sharply defined images can be obtained 
without the use of the diaphragms, provided the diameter of the 
object is somewhat less than the focal length of the objective used.l 

408. Set of 5 Adapters for the Microsummars, each engraved 

with the designation of the objective with which it is to 
be used.at $ 1.20 

409. Wooden Case with lock for the set of Diaphragms with 

illuminating lenses and the 5 adapters. 

410. Liliput Arc Lamp, 4 Amp., with rack feed, centring ad¬ 
justment, and extension gear by means of which the carbons 
can be adjusted while observing the image on the screen 

411. Table with iron legs, levelling screws, ball castors, and 

polished wood top, 225 cm (8 feet) long. 


Packing. 

412. New Large Photomicrographic Apparatus lb with 

Camera having an extension of 60 cm (24 inches) otherwise 
as above . 

413. Table with iron legs, levelling screws, ball castors, and 

polished wood top, 185 cm (6 feet) long. 


6.— Mieroelase 
1.20 Mieroeline 

18.— Mieuere 

32.— Mierolabis 
218.80 Mieologieo 
5.— 

104.— Minurie 
30.— Minuetia 


43 G am. 


9 


2 











Code word 


No. 

414. Mechanism foi actuating the fine adjustment when using 
a microscope with the old form of fine adjustment . 

415. Incandescent Gas Lamp, with sheet iron chimney 
and coloured glass discs, mounted to fit the pillar stand 

416 Acetylene Lamp, mounted to fit the pillar stand, with 
separate gas generator. 

(Acetylene light should only be used when a supply of gas or electri¬ 
city is not available ) 

417. Resistance for Liliput Arc Lamp, for 110 volt current 

418. Do. suitable for 220 volt current . . . 

419. Carbons for Liliput Arc Lamp, per pair. 


$ 

2.40 Mierauliea 
6.—- Mieatio 
13.60 Mieabam 

6.— Widerstand 
10.— Widerstehe 
— .06 Kohle 


Large Horizontal Photomicrographic 

Apparatus I. 

This apparatus conforms in size and equipment to that described 
in the preceding pages. It differs from it, however, in regard to 
the hinge arrangement which is omitted, consequently it can only be 
used in the horizontal position. 

The other details given in the preceding description apply 
equally to this apparatus, which is carried on a similar table. 

N 0 $ Code word 

420. Large Horizontal Photomicrographic Apparatus I, 

with Camera 1 metre (40 inches) in length, mounted upon 
a steel frame. One ground and one clear glass focussing 
screen, two single dark slides lor plates 24 cm X 24 cm, 
with carriers for smaller English or German sizes. Time 
and instantaneous shutter with pneumatic release. Base 
plate with vertical adjustment to suit any of our Micro¬ 


scopes. Large Illuminating Lens on Stand, together with 
two additional stands to carry the Iris Diaphragm and 
Source of Light. Magnifying Glass for focussing the 
image on the screen, and shutter between Microscope 

and Camera. 100- — Miera 

421. Iris Diaphragm to fit on Stand, with cell containing 3 
glass discs, yellow, green, and white, with ground surface, 

for use as light filters. 8. M ieranico 

Carried Forward 108.— 


10 











11 




Large Horizontal Photomicrographic Apparatus I 

































































































































No 

422. 

423. 

424. 


425. 


Brought Forward 

Glass Tank mounted to fit Pillar Stand. 

Focussing* Gear to operate new fine adjustment of Stand 

from end of Camera. 

Stage with sliding and micrometer ..screw fine adjust¬ 
ment to carry large specimens not exceeding 100 m/m 
in diameter. 

(when werking with extended Camera the lengthening rod is required 

for focussing.) 

Diaphragm with illuminatingLens for Microsummar 24m/m 


$ Code word 

108.— 

3.20 Mierantho 
6.— Mieraspis 


12.— Mieraster 


2.— Mierobal 


426. 

Do 

Do 

Do 

35m/m 

2.40 

Mierobio 

427. 

Do 

Do 

Do 

42 m/m 

3.20 

Mieroearpa 

428. 

Do 

Do 

Do 

64m/m 

4.— 

Mierocebus 

429. 

Do 

without illuminating lens 

Do 

80m/m 

—.80 

Mieroeiona 


430. 

431. 

432. 

433. 


434. 

435. 

436. 


437. 

438. 

439. 


(For the Microsummars 100 and 120 m/m the opening of the stage 
acts as a diaphragm; the large condenser provided with the appa¬ 
ratus will be found as efficient as a special lens for illuminating 
the microsummars 80. 100, and 120 m/m. 

With these illuminating Lenses sharply defined images can be obtained 
without the use of the diaphragms, provided the diameter of the 
object is somewhat less than the focal length of the objective used ) 

Set of 5 Adapters for the Microsummars, each engraved 
with the designation of the objective with which it is to 

be used .at $ 1.20 

Wooden Case with lock for the set of Diaphragms with 

illuminating lenses and the 5 adapters. 

Liliput Arc Lamp, 4 Amp. with rack feed and centring 

adjustments, but without extension gear*). 

Table with iron legs, levelling screws, ball castors, and 
polished wood top, 225 cm. (8 feet) long. 


Packing. 

Mechanism for actuating the fine adjustment when using 
a microscope with the old form of fine adjustment . 
Incandescent Gas Lamp , with sheet iron chimney 
and coloured glass discs, mounted to fit the pillar stand 
Acetylene Lamp, mounted to fit the pillar stand, with 
separate gas generator. 

(Acetylene light should only be used when a supply of gas or electri¬ 
city is not available.) 

Resistance for Liliput Arc Lamp, for 110 volt current 
Do* for 220 volt current . . 

Carbons for Liliput Arc Lamp, per pair. 


6.— 

Mieroelase 

1.20 

Mieroeline 

14.- 

Mieroeosmo 

32 — 

Mierolabis 

194.80 

5.— 

Mierografo 

2.40 

Mierauliea 

6. 

Mieatio 

13.60 

Mieabam 

6.— 

10.— 

—.06 

Widerstand 

Widerstehe 

Kohle 


If desired the lamp may be fitted with an extension gear for adjusting the 
carbons from end of Camera at an additional cost of $ 4 — 


12 









Universal Photomicrographic Apparatus II 


This Apparatus can be used with the Camera in a horizontal 
or vertical position, it can also be used as a Studio Camera. 

The Stand, as in the pattern previously described, consists of 
two parallel steel tubes mounted upon iron feet at either end, upon 
these tubes rests a rectangular iron plate covered with felt, which 
can be moved to any desired position throughout their length. The 
Microscope is secured to this plate by a cross bar and clamp which 
holds the front toes and thus fixes the instrument firmly in the 
horizontal position. A small Optical Bench is also screwed to the 
same end of the plate, upon which two separate pillars are mounted 
to carry the illuminating lens and the source of light. 



Universal Photomicrographic Apparatus II. 
(Horizontal position). 


A vertical stage for large sections of which a general view is 
required can be fixed to the plate in various positions suited to the 
focal length of the objective in use. This stage is provided with 
three diaphragms of different sizes suitable for specimens the maximum 
diameter of which does not exceed 100 m/m, and is clamped firmly 
in position by milled headed screws. 


43 G am, 


13 


3 

































A massive column is screwed in a vertical position to a pro¬ 
jection on the right hand side of the stand, on which slides a fitting 
which can be clamped in any desired position, rotation being prevented 
by a key way or groove in the column. This adjustable fitting, 
which carries two parallel tubes upon which the Camera is mounted, 
can be rotated so as to bring the Camera from the horizontal to the 
vertical position, at either of which positions stops are provided, 
it can, however, be fixed at any intermediate angle by means of a 
clamp controlled by a large hand wheel. 



Universal Photomicrographic Apparatus II. 

(Vertical position.) 

Upon one of the tubes carrying the Camera slides a grooved 
fitting capable of fixation by a thumbscrew, at both ends of which 
clamping sockets are mounted so that the camera front can be 
readily fixed at either end. The desired camera length is thus obtained, 
partly by changing from one socket to the other, and partly by 
sliding the grooved fitting along the bar upon which the length 
required can be read off. 

The front of the Camera is provided with rack and pinion 
adjustment for focussing low power objectives such as the Micro- 
summars, which are attached directly to it. 


14 























Such objectives are first fixed to a small plate and secured 
by an adapter, various adapters being of course required to suit the 
objectives used, the plate is then inserted into a forked fitting 
screwed to the front of the camera in place of a similar plate 
carrying a sleeve, with which it is interchangeable, and which 
forms a light-tight connection between microscope and camera when 
the former is in use. 

This type of apparatus has a camera extension of 50 cm. (20 inches), 
but a similar pattern, with an extension of 1 metre (40 inches) can be 
supplied to special order, for use with which it is essential to have the 
mechanism with lengthening rod for actuating the fine adjustment 
whilst observing the image on the screen; with the smaller camera 
although a convenience, this attachment is not absolutely essential. 



Universal Photomicrographic Apparatus II. 
(Arranged for photographing large Specimens. 


We recommend for use with this apparatus as an artificial 
illuminant either the Electric Arc (Liliput Lamp) or Incandescent 
Gas: the Acetylene Light can be used, but is only to be recommended 
when neither of the above is available. 


No. 

440. Universal Photomierographie Apparatus II, with Camera having an 
extension of 50 cm. (20 inches), mounted on a steel tube stand; with 
ground and clear glass focussing screens; two single dark slides for plates 
24 X 24 cm, fitted with carriers for smaller English and German sizes. 


15 




































No. 


Code word 


Plate carrying the Microscope, suitable for any of our 
Stands, with Optical Bench ; Illuminating Lens ; Magnifying 
Glass for focussing the image on the Screen, and Expo¬ 
sing Shutter.. . . . 

441. Incandescent Gas Lamp, with sheet iron chimney 
and coloured glasses, green, yellow, and matt . 

442. Focussing Gear for actuating the fine adjustment of the 

Microscope at a distance. 

443. Stage with Set of Diaphragms. 


Packing. 

444. Table with iron legs, levelling screws, ball castors and 
polished wood top 115cm. (46 inches) long, suitable forabove 

445. Universal Photomicrographic Apparatus Ila, with 

Camera having an extension of 1 metre (40 inches), 
otherwise similarly equipped as above. 

446. Table with iron legs, levelling screws, ball castors and 

polished wood top 225 cm (8 feet) long, suitable 
for the Apparatus Ila. 

447. Liliput Are Lamp 4 Amp, mounted with centring 

adjustments to fit the pillar stand. 

448. Acetylene Lamp, mounted to fit the pillar stand, with 

separate Gas Generator. 

(Acetylene Light should only be used when a supply of gas or 
electricity is not available). 

449. Resistance for Liliput Arc Lamp, suitable for 110 

Volt current. 

450. Do. suitable for 220 Volt current. 

451. Carbons for Liliput Arc Lamp, per pair . 


Photomicrographic Apparatus 


82. — Migrai 

6.— Mieatio 

6.— Mieraloa 
6— Mierabaeia 
100.— Migrava 
2 .— 

26.— Mierotea 

120.— Migravano 

32.— Mierolabis 
14.— Mieroeosmo 
13.60 Mieabam 

6 — Widerstand 
10.— Widerstehe 
—.06 Kohle 

III 


For taking photographs of Insects, 

suggested by Prof. Hermann. 

This Apparatus, which is constructed for use in the horizontal 
position only, is mounted on a stand similar to those previously de¬ 
scribed, consisting of two steel tubes resting upon two pairs of cast iron 
feet. The camera, which can be extended to 70 cm (28 inches), 
is mounted upon steel tubes in a similar manner to the large horizon¬ 
tal apparatus No. I. It has wire supports to prevent sagging, and 
the bellows frame can be retracted in the same manner. The 
front carrying the objectives is fitted with a time and instantaneous 
shutter. 


16 














Two Lamps (Liliput Arc, or Incandescent Gas) with condensing 
lenses, serve to illuminate the object. 

These lamps are mounted on slotted arms attached to the pill¬ 
ars carrying the camera front in such a manner that not only the 
distance of the illuminant but also the angle of incidence of the 
light can be varied within wide limits, it thus becomes an easy 
matter to illuminate an object brightly and uniformly, or to control 
the density and position of the shadow required to give the necessary 
contrast. 

The object holder consists of a base plate sliding upon the 
tubular base to which it can be clamped in any desired position 
by means of a thumb screw. It has two micrometer screw adjust¬ 
ments for moving the object in a horizontal plane at right angles 
to one another, one of which serves for lateral displacement, and 
the other for focussing the image on the screen. The former is 
especially useful when taking stereoscopic pictures, and both are 
provided with lengthening rods, so that the adjustments are easily 
effected when sitting in front of the focussing plate. 



Photomicrographic Apparatus III. 


For taking photographs of Insects, after Prof. Hermann. 

For the vertical adjustment of the object a rack and pinion 
adjustment is provided, upon which is mounted a universal aim 
carrying a glass rod, the possible movements of which are w ell 
shown in the illustration, the object being fixed to the point of the 
rod by an adhesive, or by first mounting upon cork. 

In order to render the Apparatus suitable for taking pictures 
by transmitted light the universal arm figured and desciibed must 


17 
































































be removed from the pillar which is actuated by the rack and 
pinion, and replaced by a vertical stage; the illuminant (Liliput 
Arc or Incandescent Gas) and condenser are then mounted on a 
special removable optical bench behind the stage. 

Our Microsummars will be found particularly suitable for use 
with this apparatus, but if higher magnifications, such as can only 
be obtained with a compound microscope, be required, a tube 
carrying objective and eyepiece can be screwed into the front of the 
shutter, thus dispensing with the ordinary microscope stand. 


No. 


Code word 


452. Photomierographie Apparatus III, for photographing 

insects by reflected and transmitted light, consisting of a 
horizontal Camera 70 cm. (28 inches) long mounted upon 
an optical bench; ground and clear glass focussing screens, 
two single dark slides for plates 24 X 24 cm, with 
carriers for smaller English or German sizes; time and 
instantaneous shutter with pneumatic release; two slotted 
moveable arms upon which the lamps and condensing 
lenses are mounted; a movable stage, adjustable in all 
directions, with mechanism for actuating two of the move¬ 
ments while observing the image on the screen: magni¬ 
fying glass for focussing. 72.— Migratur 

453. Two Incandescent Gas Lamps with sheet iron 

chimneys. 12.— Migretis 

454. Two Illuminating Lenses 100 m/m diameter . . . 16.— Migueros 

455. Accessory Apparatus for use when using transmitted 


light, consisting of a tube screwing into the camera 
front, vertical stage, and small optical bench for illuminant 
and condensing lens. 10 .— 

110 .— 


Mikado 

Migravero 


Packing. 

456. Table with iron legs, levelling screws, ball castors and 

polished wood top 115 cm. (46 inches) long, suitable 
for above apparatus . 

457. Two Liliput Arc Lamps 4 Amp. mounted with centring 

adjustments and condensing lenses. 

458. Resistances for Liliput Arc Lamps suitable for 110 volt 

current,. each 

459. Do suitable for 220 volt current . . ,, 

460 Carbons for Liliput Arc Lamp, per pair . 


2.- 


26. 

Mierotea 

36.— 

Migratos 

6.— 

Widerstand 

10.— 

Widerstehe 

-.06 

Kohle 


18 










Small Photomicrographic Apparatus IV. 

This Apparatus, which has a Camera extension of 25 cm. (10 
inches), is designed for use in the vertical position only. It consists 
essentially of a rectangular base-plate of iron covered with cloth, on 
one side of which a vertical steel rod is mounted in a massive socket. 

This rod carries the Camera, which, by means of two clamping 
fittings as shown in the illustration, can be fixed at any required 
height, and when so fixed rotated for the final adjustment of the 
specimen on the stage by direct observation, the return of the 



Small Photomicrographic Apparatus IV. 


camera to exact alignment with the optic axis of the microscope 
being insured by the provision of a spring catch on the camera 
fitting, which engages with a groove in the steel rod. 

The length of the camera is adjusted by sliding the rod carrying 
the front up or down in the grooved fitting in which it is mounted. 

A light tight connection is fitted to the front of the camera for 
use with the microscope, into which photographic objectives 
(Microsummars) can be fitted by means of the sliding adapters 
provided, when the microscope is dispensed with. 


19 



















































No. 

461. Small Photomierographic Apparatus IV, with vertical 

camera having a maximum extension of 25 cm. (10 inches); 
ground and clear glass focussing screens; two single 
dark slides for plates 18 cm by 13 cm with carriers for 
smaller sizes, Shutter, and Magnifier for focussing . . 

462. Incandescent Gas Lamp, on a table stand with 

sheet iron chimney and 3 glass discs for use as light 
modifiers, ground, yellow, and green. 

463. Condensing 1 Lens 100 m/m diameter, upon Table Stand 


Packing 1 . 

464. Small Photomierographic Apparatus IVa, with verti¬ 

cal camera having a maximum extension of 50 cm. (20 
inches), otherwise as above. 

465. Attachment for obtaining the requisite displacement of 
the objective when taking stereoscopic pictures 

466. Liliput Are Lamp 4 Amp, mounted on a table stand 

with condensing lens. 

467. Resistance for Liliput Arc Lamp, suitable for 110 

Volt current. 

468. Do. suitable for 220 Volt current. 

469. Carbons for Liliput Arc Lamp, per pair. 


$ 

Code word 

40.- 

Migravi 

6.— 

Mikail 

8.— 

Illuminize 

54.— 

Migpavisse 

1.— 


62.- 

Migravimus 

6.— 

Mikion 

16.— 

Liliputer 

6.— 

10.— 

-.06 

Widerstand 

Widersteho 

Kohle 


Microsummars. 

To obtain pictures giving a general view of large transparent 
specimens, or of opaque objects requiring considerable depth of focus, 
we would recommend our Microsummars of 24, 35, 42, 64, and 
80 m/m focal length, also the Summars of 100 and 120 m/m focus, 
Series I. 

Both Series, Microsummar and Summar, have an aperture of 
F/4.5, and are perfectly corrected, being free from chromatic and 
spherical aberration and astigmatic error. 


20 










Microsummars and Summars F/4.5 
with Iris-diaphragm. 



Focus mm 

24 

35 

42 

64 

Oo 

O 

100 

120 

Price . . $ 

24.- 

24.- 

24. - 

28. 

30. 

1 

CO 

40.— 

Code word 

Summara 

Summanetis 

Summanat 

Summand 

Summarize 

Summa 

Su mmario 


Magnifications of the Microsummars and Summars F/4.5, 


Distance of the focussing 
screen from the diaphragm 
of the objective in mm 

Designation of Objective 

in mm of focus 

120 

100 

80 

64 

42 

35 

24 

250 

1 

IV* 

2 

3 

472 

6 

9 

500 

3 

4'/ 2 

572 

7 

11 

14 

20 

1000 

7 

1 

9 

1172 

15 

23 

28 

46 


The maximum diameter of the object photographed should not 
exceed the focal length of the objective. 


21 



































































Achromatic Objectives. 


Designation of 
Objective 

Focal Length 
(Fo)** 

mm inch 

Numerical 
Aperture 
(N. A.) 

Micrometer Values 
measured with 
Eyepiece II 

Price 

$ 

Code word 

1* 

42 

1 5 /s 

0.08 

0.062 mm = 62 /u 

3.25* 

Oakum 

1 1 

40 

17a 

0.11 

0.054 mm = 54 /u 

6.— 

Oaritls 

ft 1a 

33—24 

174—1 

0.05—0.07 

0.080 — 0,054 mm 
80—54 /< 

10.— 

with corr. 
collar 

Oasenos 

1 2 

24 

1 

0.21 

0.030 mm = 30 /u 

6.- 

Obarat 

/ 3 

Dry Series\ 

1 3a 

16.2 

7s 

0.30 

0,017 mm = 17 

6.— 

Ocaleo 

13.0 

72 

0.40 

0 

0 

3 

3 

II 

ui 

8.— 

Ocalear 

1 4 

10.0 

7^ 

0.47 

0.009 mm = 9 ,« 

10.— 

Oderite 

1 5 

5.4 

1 

V, 

0.77 

0.0054 mm = 5.4 /1 

10.— 

Oedipe 

6 

4.0 

V® 

0.82 

0.0037 mm = 3.7 ,u 

• 

12.— 

Oflte 

\ 7 

3.2 

Vs 

0.85 

0.0029 mm = 2.9 /1 

12.— 

Ogdoad 

Water- 

Immersion 

2,1 

V 12 

1.20 

0.0018 mm = 1.8 // 

28.— 

Wateroog 

Oil-immer- ^/ 10 

2.8 

V10 

1.30 

0.0026 mm = 2.6 « 

30. 

Immersit 

Lenses rl /12 

1.8 

V12 

1.30 

0.0017 mm = 1.7 i > 

40. - 

Immersion 


** For explanation of this term see our pamphlet: ’’The Microscope, and 
some hints on how to use it“. 

* The formula of objective 1* is that of a single doublet. It suffices for 
many purposes, though its light-transmitting power is slightly less than that of 
objective No. 1. 


22 























































































Fluorite Objectives 


Designation of 
Objective 

Focal 

Length 

(Fo)f 

mm 

Numerical 
aperture 
(N. A.) 

Micrometer Values 
measured with Eye¬ 
piece II 

Price 

$ 

Code word 

Dry- 

Series 

1 

6a 

4.0 

0.82 

0.0037 mm = 3.7 u ■, 16.— 

Ofuscar 

1 7a 

3.2 

0.85 

0.0029 mm = 2.9 f 

16. - 

Ogmore 

)• 

2.6 

0.87 

0.0024 mm = 2.4 fi 

16.—** 

Ohlme 

9 

2.2 

0.87 

0.0019 mm = 1.9 fi 

28.—** 

Oigamos 

Oil- 

immer¬ 
sion Ob¬ 
jectives 

112a 

1.8 

1.32 

0.0017 mm = 1.7 /u 

52. 

Immersivo 

1/16 

„ 

1.32 

0.0014 mm = 1.4 ri 

60.— 

Immersorum 


** Objectives 8 and 9 may be provided with a correction collar, which 
adds $ 6 .— to their cost 

Apochromatic Objectives. 


Designation of 
Objective 

Focal 

Length 

(Fo)f 

mm 

Numerical 
Aperture 
(N. A.) 

Micrometer 

Values 

measured with 

Comp. Oe. 4 

Price 

$ 

Code word 

Dry 

Series 

16mm 

16 

0.30 

0.0160 mm 

24.— 

Apochabo 

Apochanda 

8 „ 

8 

0.65 

0.0080 mm 

CO 

to 

4 „ 

4 

0.95 

0.0040 mm 

00 

w Correctiou 
Collar 

flpocharem 

3 „ 

3 

0,95 

0,0030 mm 

52.— 

Apochaturus 

Oil 

Immersion 

2 mm 

2 

1.32 

0.0020 mm 

100.— 

Apochauit 

2 ” 

2 

1.40 

0.0020 mm 

* 

1 

o 

CO 

T—« 

Apocho 


* Although, considering its very high aperture, this objective is substantially 
mounted yet it is advisable to exercise the greatest care in its use so as to avoid 
the risk of forcing in the front lens. Should this however occur we are prepared 
to remount the lens free of charge, provided it is otherwise undamaged. 

f For explanation of this term, see our pamphlet: ’’The Microscope, and 
some hints on how to use it“. 


23 
































































































Huyghenian Eyepieces. 


Designation 

0 

1 

II 

III 

IV 

V 

Focal Length: (Fe)f mm 

62.5 

50.0 

41 65 

31.25 

25.0 

20.85 

250 , 

Eyepiece Magnifieati. Fe t 

4 

5 

6 

8 

10 

12 

Code-word 

Oculabo 

Oculaire 

Ocular 

Ocularetur 

Oculari us 

Oculariter 


Price, each $ 2. —. 


Compensating Eyepieces 

for the Apochromatic Objectives. 


Designation 

2 

4 

6 

8 

12 

18 

Focal Length Fef mm 

90 

45 

30 

22.5 

15 

10 

Eyepiece 250f 

Magnifieation Fe 

2.8 

5.6 

8, 

11.1 

16.7 

25.0 

Price .... $ 

6.50 

6.50 

6.50 

10. 

10.— 

8.- 

Code word 1 Compe 

Compensa 

Compensado 

Compensare 

Compensavi 

Compensing 


Compensating- Eyepiece 4 or 6 with micrometer: $ 8.50. 

Code-word: Compensor Compensons 


Projection Eyepieces. 


Designation 

! 

II 

III 

Focus (Fe)f mm 

90 

45 

22.5 

Eyepiece Magnification 2 ^° ! 

.T C 

2.6 

6.0 

10.0 

Price. $ 

14.— 

14 — 

14.— 

Code word 

Projicare 

Projicet 

Projicis 


f For explanation of these terms see our pamphlet: ’’The Microscope, and 
some hints on how to use it.“ 


24 


































































Initial Magnifications of Objectives. 



Objective 


Objective 

Achromatic 

Magnifietn. 

Apochromatic 

Magnifietn. 

Objectives 

A i 

and Fluorite objectives 

A . 

Fo. 1 


Fo. 1 


Dry 


No. V 


Water- 

immersion 


1 a 


3a 


, 10 


Homogeneous 
Oil immersion 


7io_ 

7i» 


2,7 


3.2 


2,0—3, 

5.8 


10.3 


14.1 

18.2 


33.3 


46.0 


58.1 


90.6 


70.0 


100.0 


Apochromat 16 mm 


Dry 


Homogeneous 
Oil 

Immersion 


8 


FI uorite No. 6 a 


„ 7 a 


„ § 


„ 9 


Visa 


11.5 


23.0 


46.0 


66.0 


46.0 


58.1 


69.1 


85.2 


100.0 


7< 


16 


Apochromat 2 mm 


114.0 


92.0 


The total magnification for any given combination of objective, 
eyepiece and camera extension can be obtained by multiplying the 
initial magnification of the objective given above by the number 
given in the next table representing the magnification of the eyepiece 
at the extension chosen. 

For example; The objective 4 with the projection eyepiece II 
and camera extension of 400 mm will give a magnification ot 

18.2 X 11.0 = 200 

similarly an objective 6 with the projection eyepiece I, and a camera 
extension of 1000 mm, will give a magnification ot: 

46 X 11-5 = 530. 


f For explanation of this term, see our pamphlet : „The Microscope and 
some hints on how to use it“. 


25 














































































Magnifications of Eyepieces. 

Projection, Huyg-henian and Compensating 1 
at various Camera extensions. 


Extension of cam 

in mm 

era 

Fe 

1000 

800 

600 

500 

400 

300 

250 

200 

Proieetion 

Eyepieces 

1 

90 

11.5 

9.2 

6.7 

5.6 

4.5 

3.1 

2.6 

1.8 

II 

45 

27.5 

22 

16.5 

13.5 

11 

7.5 

6 

4.5 

III 

22.5 

40 

32 

24 

20 

16 

12 

10 

8 

/ 

( 

t 

0 

62.5 

16 

13 

10 

8 

6 

5 

4 

3.2 

1 

\ 

50 

20 

16 

12 

10 

8 

6 

5 

4 

Huyg-henian 

ii 

41.65 

24 

19 

14 

12 

10 

7 

6 

4.8 

Eyepieces 

i 

111 

31.25 

32 

26 

19 

16 

13 

10 

8 

6.4 

* IV 

25 

40 

32 

24 

20 

16 

12 

10 

8 

^ V 

20.85 

48 

38 

29 

24 

19 

14 

12 

9.6 

. ( 
sating- 7 
Eyepieces 

/ 

i 

\ 

4 

45 

22 

18 

13 

11 

9 

7 

5.6 

4.4 

6 

30 

34 

27 

20 

17 

13 

10 

8.3 

6.7 

8 

22.5 

45 

36 

27 

22 

18 

13 

11.1 

8.9 

12 

15 

67 

53 

40 

33 

27 

20 

16.7 

13.3 

18 

10 

100 

80 

60 

50 

40 

30 

25 

20 


In addition to the Projection Eyepieces I, II and III which are 
specially constructed for Photomicrographic work, the Huyghenian 
Eyepieces 0, I and II will be found particularly useful. 


26 





















































































































Notes on illustrations 


The following 12 reproductions from negatives taken with the foregoing 
apparatus are inserted as a practical demonstration of the excellence of the 
results obtainable. 

The prints are on Bromaryt Paper manufactured by The Neue Photo- 
graphischen Gesellschaft, Berlin-Steglitz, which we can highly recommend for 
this class of work. 

Details as to magnification, illumination, and exposure, are as follows: 

No. 1. Spirochaeta pallida. 

Magnification X 1000. Objective 712 “ oil immersion, Eyepiece No 4. 

Illumination — Liliput Arc-Lamp 4 amp; darkground Condenser. 

Exposure — 5 seconds. Perorto plate. 

No. 2. Malaria. 

Magnification X 1080. Apochromatic Objective 2 m/m oil immersion, 
Compensating Ocular 8. 

Illumination — Liliput Arc Lamp 4 amp; darkground Condenser; pale 
blue screen. 

Exposure — 10 seconds. Perorto plate. 

No. 3. Trypanosoma. 

Magnification X 1080. Apochromatic Objective 2 m/m oil immersion, 
Compensating Ocular 8. 

Illumination — Liliput Arc Lamp 4 amp; two-lens condenser, yellow- 
green screen. 

Exposure — 1V 2 minutes. Eosine-bathed plate. 

No. 4. Amphipleura pellueida. 

Magnification X 1150. Apochromatic Objective 2 m/m oil immersion, 
Compensating Ocular 4. 

Illumination — Liliput Arc Lamp 4 amp; Aplanatic Condenser, iris 
diaphragm closed to 1 m/m aperture and decentred; deep blue screen. 

Exposure — 6 minutes. Perorto plate. 

No. 5. Anthrax. 

Magnification X 1080. Apochromatic Objective 2 m/m oil immersion 
Compensating Ocular 8. 

Illumination — Liliput Arc Lamp 4 amp; two-lens condenser, yellow 
screen. 

Exposure — 1 minute. Eosine-bathed plate. 


27 


No. 6. Meteorite. 

Magnification X 12. Objective No. 1, Eyepiece 0. 

Illumination — Daylight. 

Exposure — 5 seconds. Perorto plate. 

No. 7. Epithelium, degeneration. 

Magnification X 200. Objective No. 6, Eyepiece 0. 

Illumination — Liliput Arc Lamp 4 amp; two-lens condenser, yellow 
screen. 

Exposure — 20 seconds. Eosin-bathed plate. 

No. 8. Palao Pikrite (Westerwald). 

Magnification X 60. Objective No. 3, Eyepiece 1. 

Illumination —- Daylight. 

Exposure — 30 seconds. Perorto plate. 

No. 9. Kidney of Rabbit (injected with Woot’s metal). 

Magnification X 2 4 /a. Summar F/4.5, 120 m/m focal length. 
Illumination — Daylight; diaphragm 96. 

Exposure — 15 minutes. Perorto plate. 

No. 10. Bud of fraxinus, (transverse section). 

Magnification X 5 x /2. Microsummar 42 m/m. 

Illumination — Liliput Arc Lamp 4 amp; green screen. 

Exposure — 1 second. Eosine-bathed plate. 

No. 11. Philosoma. 

Magnification X 4. Microsummar 24 m/m. 

Illumination — Liliput Arc Lamp 4 amp; green screen. 

Exposure — D /4 seconds. Eosine-bathed plate. 

No. 12. Throat of Turtle. 

Magnification X 7. Microsummar 42 m/m. 

Illumination — Liliput Arc Lamp 4 amp ; green screen. 

Exposure — 3 /4 second. Eosine-bathed plate. 


28 















12 
















*